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Verified answer
Luas Karton :L = pl
L = 60 × 40
L = 2.400 cm²
Panjang Foto :
Lebar = 40 cm - 3 cm - 3 cm = 34 cm
60/40 = p/34
40p = 2.040
p = 51 cm
Luas Foto :
L = pl
L = 51 × 34
L = 1.734 cm²
Luas Karton yang Tidak Tertutup :
L = 2.400 cm² - 1.734 cm²
L = 666 cm²
Jawaban : B. 666 cm²
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